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-rw-r--r--Documentation/DocBook/media/v4l/controls.xml82
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml6
-rw-r--r--drivers/media/video/v4l2-ctrls.c14
-rw-r--r--include/linux/videodev2.h8
4 files changed, 109 insertions, 1 deletions
diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml
index 43cd4958c9e8..662127447aa6 100644
--- a/Documentation/DocBook/media/v4l/controls.xml
+++ b/Documentation/DocBook/media/v4l/controls.xml
@@ -3685,4 +3685,86 @@ interface and may change in the future.</para>
</section>
+ <section id="image-process-controls">
+ <title>Image Process Control Reference</title>
+
+ <note>
+ <title>Experimental</title>
+
+ <para>This is an <link
+ linkend="experimental">experimental</link> interface and may
+ change in the future.</para>
+ </note>
+
+ <para>
+ The Image Source control class is intended for low-level control of
+ image processing functions. Unlike
+ <constant>V4L2_CID_IMAGE_SOURCE_CLASS</constant>, the controls in
+ this class affect processing the image, and do not control capturing
+ of it.
+ </para>
+
+ <table pgwide="1" frame="none" id="image-process-control-id">
+ <title>Image Source Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_IMAGE_PROC_CLASS</constant></entry>
+ <entry>class</entry>
+ </row>
+ <row>
+ <entry spanname="descr">The IMAGE_PROC class descriptor.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_LINK_FREQ</constant></entry>
+ <entry>integer menu</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Data bus frequency. Together with the
+ media bus pixel code, bus type (clock cycles per sample), the
+ data bus frequency defines the pixel rate
+ (<constant>V4L2_CID_PIXEL_RATE</constant>) in the
+ pixel array (or possibly elsewhere, if the device is not an
+ image sensor). The frame rate can be calculated from the pixel
+ clock, image width and height and horizontal and vertical
+ blanking. While the pixel rate control may be defined elsewhere
+ than in the subdev containing the pixel array, the frame rate
+ cannot be obtained from that information. This is because only
+ on the pixel array it can be assumed that the vertical and
+ horizontal blanking information is exact: no other blanking is
+ allowed in the pixel array. The selection of frame rate is
+ performed by selecting the desired horizontal and vertical
+ blanking. The unit of this control is Hz. </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PIXEL_RATE</constant></entry>
+ <entry>64-bit integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Pixel rate in the source pads of
+ the subdev. This control is read-only and its unit is
+ pixels / second.
+ </entry>
+ </row>
+ <row><entry></entry></row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </section>
</section>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
index f2d2ec3f0e31..0a4b90fcf2da 100644
--- a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
@@ -278,6 +278,12 @@ These controls are described in <xref
source controls. These controls are described in <xref
linkend="image-source-controls" />.</entry>
</row>
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_IMAGE_PROC</constant></entry>
+ <entry>0x9f0000</entry> <entry>The class containing image
+ processing controls. These controls are described in <xref
+ linkend="image-process-controls" />.</entry>
+ </row>
</tbody>
</tgroup>
</table>
diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
index 7a2f855d4e21..edb2a6a066ca 100644
--- a/drivers/media/video/v4l2-ctrls.c
+++ b/drivers/media/video/v4l2-ctrls.c
@@ -650,6 +650,11 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_HBLANK: return "Horizontal Blanking";
case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
+ /* Image processing controls */
+ case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
+ case V4L2_CID_LINK_FREQ: return "Link Frequency";
+ case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
+
default:
return NULL;
}
@@ -741,6 +746,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
*type = V4L2_CTRL_TYPE_MENU;
break;
+ case V4L2_CID_LINK_FREQ:
+ *type = V4L2_CTRL_TYPE_INTEGER_MENU;
+ break;
case V4L2_CID_RDS_TX_PS_NAME:
case V4L2_CID_RDS_TX_RADIO_TEXT:
*type = V4L2_CTRL_TYPE_STRING;
@@ -752,6 +760,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_FLASH_CLASS:
case V4L2_CID_JPEG_CLASS:
case V4L2_CID_IMAGE_SOURCE_CLASS:
+ case V4L2_CID_IMAGE_PROC_CLASS:
*type = V4L2_CTRL_TYPE_CTRL_CLASS;
/* You can neither read not write these */
*flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
@@ -775,8 +784,11 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
break;
case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
case V4L2_CID_MPEG_VIDEO_DEC_PTS:
+ *flags |= V4L2_CTRL_FLAG_VOLATILE;
+ /* Fall through */
+ case V4L2_CID_PIXEL_RATE:
*type = V4L2_CTRL_TYPE_INTEGER64;
- *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE;
+ *flags |= V4L2_CTRL_FLAG_READ_ONLY;
*min = *max = *step = *def = 0;
break;
default:
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 3cd13b2faab5..0ae6eb2fb1f3 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -1140,6 +1140,7 @@ struct v4l2_ext_controls {
#define V4L2_CTRL_CLASS_FLASH 0x009c0000 /* Camera flash controls */
#define V4L2_CTRL_CLASS_JPEG 0x009d0000 /* JPEG-compression controls */
#define V4L2_CTRL_CLASS_IMAGE_SOURCE 0x009e0000 /* Image source controls */
+#define V4L2_CTRL_CLASS_IMAGE_PROC 0x009f0000 /* Image processing controls */
#define V4L2_CTRL_ID_MASK (0x0fffffff)
#define V4L2_CTRL_ID2CLASS(id) ((id) & 0x0fff0000UL)
@@ -1797,6 +1798,13 @@ enum v4l2_jpeg_chroma_subsampling {
#define V4L2_CID_HBLANK (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 2)
#define V4L2_CID_ANALOGUE_GAIN (V4L2_CID_IMAGE_SOURCE_CLASS_BASE + 3)
+/* Image processing controls */
+#define V4L2_CID_IMAGE_PROC_CLASS_BASE (V4L2_CTRL_CLASS_IMAGE_PROC | 0x900)
+#define V4L2_CID_IMAGE_PROC_CLASS (V4L2_CTRL_CLASS_IMAGE_PROC | 1)
+
+#define V4L2_CID_LINK_FREQ (V4L2_CID_IMAGE_PROC_CLASS_BASE + 1)
+#define V4L2_CID_PIXEL_RATE (V4L2_CID_IMAGE_PROC_CLASS_BASE + 2)
+
/*
* T U N I N G
*/
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 03:54:30 +0100